Im still getting sent back to the second mission of halo no matter how much of the playlist I beat. Most people had this problem with the armory on H2 which is where I first encountered it. Next playthrough I beat all of Halo CE and got to metropolis on H2. Well i got sent back again and its irritating since this bug has been here for a very long time. Please fix this soon or at least let people load into the unfinished mission of their choice if we want to be lazy about it.
I just ran into this myself… all the way to mission 36(Dawn of Halo 4) and BOOM, back to mission 2 (Halo of Halo:CE). Very infuriating. Mines shows it’s on Dawn until I go to resume. That is when it switches.